And william s



JAMES E. immensely,V or Treinreis,l New JERSEY', AND WILLnrM s. Winsen,

OF JAMESTOWNQNEW YORK.

Letterslfatent No. 7 4,522, dated February 18, 1868.

IMPRGVEMENT IN SAWS.

VTO ALL WHOM IT MAY CONCEEN:l l

n lle it known that we, J. E. YEMERSONUVO" Trenton, in the county of Mercer, and State of New Jersey, and i WILLIAM S. WINSOR, formerly ofT Titusville, Pennsylvania, now residing in Jamestown, in the county of Chau# tauqua, and Stute et' New York, have invented certain new and useful lnprovements in PlaningfSaWs.; and We do herebyde'elare the following to bev a full, clear, and exact description of the same, reference being had tothe accompanying drawings', making a part of `this speciiicatjon, in which- Figure 1 represents a portionoi' Ya circular saw constructed after our 4general plain.

Figures 2 and 3 representvertical transverse sections through the same, showing the projection ofthe, plunersfrom the faces of the saw.

Figure-4 represents, on an enlarged scale, a perspective viewvof one of the planing-tools or cutters,

Figure 5 represents a tool in place, for removing or replacing the plnningcutter when it is to be sharpened,

or for any other purpose.

Similar letters of reference, where they occur in the separate ligures,'denote like parts in all the drawings.

Our invention relates to a rernov'able and replaceable planing-crntter, in connection with a. saw-plate thatis thinner at its edge than at its central portion, or so that the saw-teeth and planing-cutters, jointly, shall make u kerf or space suicient forthe body of thesaw to pass through.

To enable others skilled in the art to make and use our'invention, we will proceed to describe the same with reference to the drawings, first premising thatthe invention is equally applicable to reciprocating as t0 rotary sans.

A represents a saw-platqniade `thin at its outer edge, Vand thicker towards its centre.A The planing-cutters,

C, are so constructed as to be reversible, and thus be used for planing on either face of the saw, or on both of its faces, as may be desired. The teeth, B, of the san', which are hilso of the removable kind, are so made as to cut a kerf ot' suihucient widthto clear the thin or outer portion of the Saw, and-the planingcutters are set to plane ofi` the roughsurfaceleftby the saw-teeth, and widen the kerf suicient to clear'the saw where it is thicker than at its edge. In sawing and planing at one operation, it will be found necessary to have a. support, guide, or gauge, behind the planing-cutters, to prevent the timber from being drawn into or towards the cutting orfplaning-edges, and which, if not prevented, causes rough Work. This supporter bearing may he obtained in various ways, either by making the saw-piate thicker at or near the planing-cutters, or by makingthe cutters thicker at one edge, so as t-ofll 'the korf, or by inserting other pieces into the plate, at or near the edge of the cutters, or by placing a deiiectingplate or piece on either or both sides Aof the Ycutter or saw. YMaking the saw thicker at the centre than at the edge, niekes it serve as aisupport to the timber near the cutter, and prevents the cutters from running into the wood. It also gives support to the rim, which may be made very thin.

A saw made as herein described, may be used 'as a faceplateA planer, the piece to be planed being run on a carriage, andthus pinned out of wind, and reduced to a uniform thickness or width. The saw takes olf-the excess, and the planer smooths it. For sawing, the plate nay he slightly thicker at the centre than atthe edge, so as to open the kerf to let the teeth pass through free on the rear, without cutting or mai-ring the "planed surface. In sawing and planing with a saw such as just above described, no more wood is cut away than by a common saw-korf, because the saw-teeth are very thin, cutting a very narrow korf, and the planers take otf the balance, to make it wide enough for the body of the saw to'pass through. Aplatemay be rolledfso astobe thin at the edge, or three plates may he united, allowing the centre one to project far enough to form the teeth,

vand a support 'for the planing-cutters. For removing and replacing theplaners, a holeha, may be made in them, in which a steel pin, D,-fig. -5, may be placed, nnd'by tapping on the pin, loosen or fasten the plauers, as may be desired.

Having thus fully described our invention, what we claim therein as new, and desire to secure by Letters Patent, is

- In combination with a saw-plate that is thinner at its edge than at its central portion, the removable and replaceable teeth and planing-cutters, substantially in the manner upd for the purpose described.

l p J. E. EMEesoN, Witnesses to signature of J. E. EMERSON: Y WM. S. WINSOR.

A. B. SToueuToN, AEDM. F. BROWN. Witnesses to signature of W. S. WINSOR: JOHN J. KINNEY,A y SAMr. G. CURTIS. 

